68240641 has 16 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 56057040.

The previous prime is 68240633. The next prime is 68240681. The reversal of 68240641 is 14604286.

It is a cyclic number.

It is not a de Polignac number, because 68240641 - 2³ = 68240633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (68240621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21750 + ... + 24688.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^68240641 is an apocalyptic number.

It is an amenable number.

68240641 is a deficient number, since it is larger than the sum of its proper divisors (13044479).

68240641 is a wasteful number, since it uses less digits than its factorization.

68240641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 68240641 is about 8260.7893690615. The cubic root of 68240641 is about 408.6464205870.

The spelling of 68240641 in words is "sixty-eight million, two hundred forty thousand, six hundred forty-one".